| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This file intentionally does not have header guards, it's included |
| // inside a macro to generate values. |
| |
| // This file contains the list of QUIC protocol flags. |
| |
| // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC |
| // connection options. |
| QUIC_FLAG(bool, FLAGS_quic_allow_new_bbr, true) |
| |
| // Time period for which a given connection_id should live in the time-wait |
| // state. |
| QUIC_FLAG(int64_t, FLAGS_quic_time_wait_list_seconds, 200) |
| |
| // Currently, this number is quite conservative. The max QPS limit for an |
| // individual server silo is currently set to 1000 qps, though the actual max |
| // that we see in the wild is closer to 450 qps. Regardless, this means that |
| // the longest time-wait list we should see is 200 seconds * 1000 qps, 200000. |
| // Of course, there are usually many queries per QUIC connection, so we allow a |
| // factor of 3 leeway. |
| // |
| // Maximum number of connections on the time-wait list. A negative value implies |
| // no configured limit. |
| QUIC_FLAG(int64_t, FLAGS_quic_time_wait_list_max_connections, 600000) |
| |
| // Enables server-side support for QUIC stateless rejects. |
| QUIC_FLAG(bool, FLAGS_enable_quic_stateless_reject_support, true) |
| |
| // This flag is not in use, just to keep consistency for shared code. |
| QUIC_FLAG(bool, FLAGS_quic_always_log_bugs_for_tests, true) |
| |
| // If true, multipath is enabled for the connection. |
| QUIC_FLAG(bool, FLAGS_quic_enable_multipath, false) |
| |
| // If true, require handshake confirmation for QUIC connections, functionally |
| // disabling 0-rtt handshakes. |
| // TODO(rtenneti): Enable this flag after CryptoServerTest's are fixed. |
| QUIC_FLAG(bool, FLAGS_quic_require_handshake_confirmation, false) |
| |
| // If true, disable pacing in QUIC. |
| QUIC_FLAG(bool, FLAGS_quic_disable_pacing_for_perf_tests, false) |
| |
| // If true, QUIC public reset packets will have the \"pre-v33\" public header |
| // flags. |
| QUIC_FLAG(bool, FLAGS_quic_use_old_public_reset_packets, true) |
| |
| // If true, QUIC will use cheap stateless rejects without creating a full |
| // connection. |
| QUIC_FLAG(bool, FLAGS_quic_use_cheap_stateless_rejects, true) |
| |
| // If true, QUIC respect HTTP2 SETTINGS frame rather than always close the |
| // connection. |
| QUIC_FLAG(bool, FLAGS_quic_respect_http2_settings_frame, true) |
| |
| // If true, enables QUIC_VERSION_35. |
| QUIC_FLAG(bool, FLAGS_quic_enable_version_35, true) |
| |
| // If true, re-enables QUIC_VERSION_36. |
| QUIC_FLAG(bool, FLAGS_quic_enable_version_36_v2, true) |
| |
| // If true, use async codepaths to invoke ProofSource::GetProof. |
| QUIC_FLAG(bool, FLAGS_enable_async_get_proof, false) |
| |
| // If true, requires handshake confirmations for all QUIC handshakes with |
| // versions less than 33. |
| QUIC_FLAG(bool, FLAGS_quic_require_handshake_confirmation_pre33, false) |
| |
| // If true, defer creation of new connection till its CHLO arrives. |
| QUIC_FLAG(bool, FLAGS_quic_buffer_packet_till_chlo, true) |
| |
| // Disable MTU probing if MTU probe causes ERR_MSG_TOO_BIG instead of aborting |
| // the connection. |
| QUIC_FLAG(bool, FLAGS_graceful_emsgsize_on_mtu_probe, true) |
| |
| // If true, only open limited number of quic sessions per epoll event. Leave the |
| // rest to next event. This flag can be turned on only if |
| // --quic_buffer_packet_till_chlo is true. |
| QUIC_FLAG(bool, FLAGS_quic_limit_num_new_sessions_per_epoll_loop, true) |
| |
| // If true, lazy allocate and early release memeory used in |
| // QuicStreamSequencerBuffer to buffer incoming data. |
| QUIC_FLAG(bool, FLAGS_quic_reduce_sequencer_buffer_memory_life_time, true) |
| |
| // If true, allow server address change if it is because of mapped ipv4 address. |
| QUIC_FLAG(bool, FLAGS_quic_allow_server_address_change_for_mapped_ipv4, true) |
| |
| // If true, disables QUIC version less than 34. |
| QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, false) |
| |
| // When true, decode the packet number from the largest received packet, rather |
| // than the most recent. |
| QUIC_FLAG(bool, FLAGS_quic_packet_numbers_largest_received, true) |
| |
| // Only close the connection on the 5th RTO client side when the 5RTO option |
| // is enabled. |
| QUIC_FLAG(bool, FLAGS_quic_only_5rto_client_side, true) |
| |
| // If true, QUIC server push will enabled by default. |
| QUIC_FLAG(bool, FLAGS_quic_enable_server_push_by_default, true) |
| |
| // Only inform the QuicSentPacketManager of packets that were sent, |
| // not those that we tried to send. |
| QUIC_FLAG(bool, FLAGS_quic_only_track_sent_packets, true) |
| |
| // If true, connection is closed when packet generator is trying to |
| // add a frame which alone cannot fit into a packet. |
| QUIC_FLAG(bool, FLAGS_quic_close_connection_on_huge_frames, true) |
| |
| // As the Linux kernel does, limit QUIC's Cubic congestion control to |
| // only increase the CWND 1 packet for every two packets acked. |
| QUIC_FLAG(bool, FLAGS_quic_limit_cubic_cwnd_increase, true) |
| |
| // If true, export reject reasons for all rejects, i.e., rejects, |
| // stateless rejects and cheap stateless rejects. |
| QUIC_FLAG(bool, FLAGS_quic_export_rej_for_all_rejects, true) |
| |
| // Allow large send deltas to be used as RTT samples. |
| QUIC_FLAG(bool, FLAGS_quic_allow_large_send_deltas, true) |
| |
| // Engage early retransmit anytime the largest acked is greater than |
| // or equal to the largest retransmittable packet. |
| QUIC_FLAG(bool, FLAGS_quic_largest_sent_retransmittable, true) |
| |
| // If true, close connection when sequencer buffer enter into unexpected state. |
| QUIC_FLAG(bool, FLAGS_quic_stream_sequencer_buffer_debug, true) |
| |
| // If true, release QuicCryptoStream\'s read buffer when stream are less |
| // frequently used. |
| QUIC_FLAG(bool, FLAGS_quic_release_crypto_stream_buffer, false) |
| |
| // Use a more conservative backoff of 2x instead of 1.5x for handshake |
| // retransmissions, as well as a larger minimum. |
| QUIC_FLAG(bool, FLAGS_quic_conservative_handshake_retransmits, true) |
| |
| // If true, buffer packets while parsing public headers instead of parsing down |
| // if CHLO is already buffered. |
| QUIC_FLAG(bool, FLAGS_quic_buffer_packets_after_chlo, false) |
| |
| // Previously QUIC didn't register a packet as received until it was fully |
| // processed, but now that flow control is implemented, it can be received once |
| // decrypted. |
| QUIC_FLAG(bool, FLAGS_quic_receive_packet_once_decrypted, false) |
| |
| // If true, enable the Lazy FACK style loss detection in QUIC. |
| QUIC_FLAG(bool, FLAGS_quic_enable_lazy_fack, true) |
| |
| // If true, do not override a connection in global map if exists. Only create |
| // QUIC session if it is successfully inserted to the global map. Toss the |
| // packet if insertion fails. |
| QUIC_FLAG(bool, FLAGS_quic_create_session_after_insertion, false) |
| |
| // If true, rejected packet number is removed from public reset packet. |
| QUIC_FLAG(bool, FLAGS_quic_remove_packet_number_from_public_reset, false) |
| |
| // If true, will send QUIC_PUSH_STREAM_TIMED_OUT when push stream is unclaimed |
| // and times out. |
| QUIC_FLAG(bool, FLAGS_quic_send_push_stream_timed_out_error, true) |
